Text and Sound swap

The question i have is a bit...iffy and doesnt really fit into any category, but Art and Sound seemed to be the best fit.
Anyways. I own Torchlight 2 times, once on Disc and once on Steam.

Here is the Problem. While the disc version is completely localised (entirely german) the Steam version is not.
Although i have absolutely no problem with the game being in english, id prefer our localised version.
My question is: Is it possible to just swap out text and speach files from the disc versions installation to the steam installation ?

There already is a mod called "Fackelschein" (Torchlight in german) that translates the text but not the speach files.